Interior design is an art that will allow you, even when you live in a small apartment, to transform your narrow bathroom into a real health spa. Sure, you'll not be able to fit an oversized hot tub into a tight space, but there are plenty of manufacturers who design hot tubs especially for users like you! You'll just need to look for some small, two-person hot tubs and you're done. Sure, if your bathroom is too small for a hot tub, or any tub for that matter, you could always choose a massage shower.